A/C System Control and Regulation Components

A/C System Control and Regulation Components

• If there is an A/C system malfunction, check the Climatronic Control Module (J255) DTC memory first. Refer to Vehicle Diagnosis, Testing And Information System VAS 5051/ under "Guided Fault Finding".

• If no malfunction is displayed, read the Climatronic control module measured values and activate the component with the "final control diagnosis ". Refer to vehicle diagnosis, testing and information system VAS 5051/ under "Guided Fault Finding".

• "Guided Fault Finding" describes the electrical testing procedure for the various control motors, potentiometers and sensors. Refer to vehicle diagnosis, testing and information system VAS 5051/ under "Guided Fault Finding".

• Repairing the A/C system without opening the refrigerant circuit, refer to => [ Refrigerant Circuit, Repair ] Refrigerant Circuit, Repair.

• Repair work on the A/C system that requires opening the refrigerant circuit, refer to => [ Refrigerant Circuit, Servicing ] [1][2]Refrigerant Circuit.

After finishing the repairs, perform the following work on the Climatronic control module using the vehicle diagnosis, testing and information system VAS 5051/ under "Guided Fault Finding":

- Check the DTC memory and erase any malfunctions shown.

- Check coding.

- Check the adaptation if necessary.

- Perform the basic setting.

• Components outside passenger compartment, refer to => [ Components Outside Passenger Compartment ] Components Outside Passenger Compartment

• Component inside passenger compartment, refer to => [ Components Inside Passenger Compartment ] Components Inside Passenger Compartment

• Allocating air intake unit components, refer to => [ Air Intake Components ] Air Intake Components